Is there a way of reading the input value of an S800 DI channel connected to an AC450 when the channel is blocked?

Is there a way of reading the input value of an S800 DI channel connected to an AC450 when the channel is blocked? Latest AC450 firmware, 800xA on top.

Comments (0) New comment

OursLars Rank: 215

Asked 7 months ago

Answer this question Follow

Voted best answer

According Lazydog document DI card DB element contains undocumented terminal :20 PROCESS VALUES of size 4 bytes. Try to read Integer long from DIcard:20 in the PC program. I believe it contains 32 bits as an image of DI channels not influenced by Block switch of DIS db element.

Comments (2) New comment

kamil.herman Rank: 21

Answered 7 months ago

Answers

Through the LED indication on the DI module.

Comments (1) New comment

amr hany Rank: 161

Answered 7 months ago

I dont have the manual in front of me, but is'nt there a :calcValue and a :Value you can read?
Where :value should be the IO value?

Comments (1) New comment

Martin87 Rank: 105

Answered 7 months ago

I found another way. Look at attached DI810 Control connection , property CH_STATE should contain packed channels in 16 bit integer.
I guess these channel statuses are Block independent.
Likely CH_STATE is mapped to DB terminal :93 , try to read it in online.

Comments (6) New comment

by OursLars Rank: 215 on 7/20/2020 5:06:53 AM | Like (0) | Report

Thanks, Geof. I will pass it on to site and let you know.

by OursLars Rank: 215 on 7/20/2020 5:08:57 AM | Like (0) | Report

Thanks, Kamil. I am not at the site, but will pass on and let you know.

by OursLars Rank: 215 on 7/21/2020 9:31:35 PM | Like (0) | Report

Some updates from site: (Asynchronous) terminal :93 could not be connected from a PC program. Also CH_STATE appear to have the values of the VALUE terminals for the inputs, i.e. show the manually entered value for blocked channels. However, DI_VALUES have the state of the physical inputs in a 16-bit word. Do you know what the DB terminal is called? A warning about reading these values from an AC450 from 800xA though: Unless the controller has very late firmware you may end up with an issue in the Connectivity Server, possibly requiring a re-boot (PMR SE-03-000081). The update rate is very slow (20 seconds), which makes a PC connection preferable.

by kamil.herman Rank: 21 on 7/21/2020 11:17:06 PM | Like (0) | Report

Thanks for a good news that at least something works. DI_VALUES should be available at DB terminal 95. See ID column in MB300 tab in Control connection aspect of DI810 card.
Since property IDs of S100 cards match more less DB terminals in Lazydog, so I just assume IDs in MB300 tab correspond to DB terminals in general.

by OursLars Rank: 215 on 7/21/2020 11:40:15 PM | Like (0) | Report

Thanks, Kamil. I have passed on to site, but since it is about 16:40 (440pm) here I will not know if this DB terminal (or property) can be connected to a PC element until then.

by OursLars Rank: 215 on 7/22/2020 5:35:13 PM | Like (0) | Report

Terminal 95 cannot be connected from a PC (application) program in the controller either, unfortunately.

Add new comment

kamil.herman Rank: 21

Answered 7 months ago

Question details

Is there a way of reading the input value of an S800 DI channel connected to an AC450 when the channel is blocked?

Voted best answer

Answers

Other questions needing answers

Related topics

AKS experts